Fact Sheet ST-575 October 1994 Sabal palmetto Cabbage Palm1 Edward F. Gilman and Dennis G. Watson2 INTRODUCTION Capable of reaching 90 feet or more in the woods (when shaded or protected by surrounding trees) but usually seen at 40 to 50 feet in height, this amazingly sturdy native palm has a rough, fibrous trunk that is quite variable in shape, from straight and erect, to curved or leaning (Fig. 1). Cabbage Palm is topped with a very dense, 10 to 15-foot-diameter, round crown of deeply cut, curved, palmate leaves. This is South Carolina’s and Florida’s state tree, and is well- suited to use as a street planting, framing tree, specimen, or clustered in informal groupings of varying size. Cabbage Palm is ideal for seaside locations. The four to five-foot-long, creamy white, showy flower stalks in the summer are followed by small, shiny, green to black fruits which are relished by squirrels, raccoons, and other wildlife. GENERAL INFORMATION Scientific name: Sabal palmetto Pronunciation: SAY-bull pahl-MET-oh Common name(s): Cabbage Palm, Cabbage Palmetto Family: Arecaceae USDA hardiness zones: 8B through 11 (Fig. 2) Origin: native to North America Uses: large parking lot islands (> 200 square feet in size); wide tree lawns (>6 feet wide); medium-sized Figure 1. Mature Cabbage Palm. parking lot islands (100-200 square feet in size); medium-sized tree lawns (4-6 feet wide); sidewalk cutout (tree pit); residential street tree; tree recommended for buffer strips around parking lots or has been successfully grown in urban areas where air for median strip plantings in the highway; reclamation pollution, poor drainage, compacted soil, and/or plant; small parking lot islands (< 100 square feet in drought are common size); narrow tree lawns (3-4 feet wide); specimen; 1. This document is adapted from Fact Sheet ST-575, a series of the Environmental Horticulture Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Publication date: October 1994. 2. Edward F. Gilman, associate professor, Environmental Horticulture Department; Dennis G. Watson, associate professor, Agricultural Engineering Department, Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville FL 32611. Sabal palmetto -- Cabbage Palm Page 2 Figure 2. Shaded area represents potential planting range. Availability: generally available in many areas within Fall color: no fall color change its hardiness range Fall characteristic: not showy DESCRIPTION Flower Height: 40 to 50 feet Flower color: white Spread: 10 to 15 feet Flower characteristics: showy; summer flowering Crown uniformity: symmetrical canopy with a regular (or smooth) outline, and individuals have more Fruit or less identical crown forms Crown shape: palm; upright Fruit shape: round Crown density: open Fruit length: < .5 inch Growth rate: slow Fruit covering: dry or hard Texture: coarse Fruit color: black Fruit characteristics: attracts squirrels and other Foliage mammals; inconspicuous and not showy; fruit, twigs, or foliage cause significant litter Leaf arrangement: spiral Leaf type: costapalmate Trunk and Branches Leaf margin: entire Leaf shape: orbiculate; star-shaped Trunk/bark/branches: grow mostly upright and will Leaf venation: palmate not droop; not particularly showy; should be grown Leaf type and persistence: broadleaf evergreen; with a single leader; no thorns evergreen Pruning requirement: needs little pruning to develop Leaf blade length: >36 inches a strong structure Leaf color: green Breakage: resistant Sabal palmetto -- Cabbage Palm Page 3 Crown shaft: no Cabbage Palms are generally collected from existing stands and are not grown in nurseries. Seeds Culture germinate readily in the landscape, generating many seedlings. Removing the seedlings from beneath the Light requirement: tree grows in part shade/part sun; canopy can be a nuisance. tree grows in full sun Soil tolerances: clay; loam; sand; acidic; alkaline; Sabal peregrina, planted in Key West, grows to extended flooding; well-drained about 25 feet high. Sabal minor, a native Dwarf Drought tolerance: high Palmetto, creates an exotic, usually stemless shrub, Aerosol salt tolerance: high four feet high and wide. Older Dwarf Palmettos Soil salt tolerance: good develop trunks to six feet tall. Sabal mexicana grows in Texas and looks similar to Sabal Palmetto. Other Pests Roots: surface roots are usually not a problem Winter interest: no special winter interest Giant palm weevil, cabbage palm caterpillar, and a Outstanding tree: not particularly outstanding large number of scales infest Cabbage Palm. The Invasive potential: seeds itself into the landscape giant palm weevil attacks recently transplanted palms Verticillium wilt susceptibility: not known to be and can kill them. susceptible Pest resistance: long-term health usually not Diseases affected by pests Ganoderma butt rot is perhaps the most serious USE AND MANAGEMENT disease of Cabbage Palms. It kills palms which it infects. The disease enters the trunk primarily through Cabbage Palm is about as hurricane-proof as a tree injuries on the lower trunk and roots. Avoid irrigating can be. They stand after many hurricanes have blown the trunk. There is no control for butt rot, only over the oaks and snapped the pines in two. They prevention. Remove infected palms as soon as adapt well to small cutouts in the sidewalk, and can possible. even create shade if planted on 6 to 10 foot centers. Clean the trunk of leaf bases to eliminate a habitat for roaches. Cabbage Palm is exceptionally easy to transplant and will thrive in full sun or partial shade. It will adapt to slightly brackish water as well as dry, sandy locations and requires no special care once established. But it needs to be watered regularly until established since all cut roots die back to the trunk after transplanting. New roots are regenerated from the base of the trunk and require warm soil temperatures and plenty of water to survive. There is evidence showing that removing all the fronds increases transplant survival. Tie the top-most fronds together if only lower fronds are removed so that the bud is protected during transport. Cabbage Palm is drought- tolerant, but not until it is well-established in the landscape after transplanting. New transplants (particularly those receiving too little water) are particularly susceptible to the palm weevil which kills the palm. Although one of the hardier palms, 11- degrees F. killed about twenty-five percent of the Cabbage Palms in 1983 in Baton Rouge..